<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-app-q-list.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: Controller for most question listing pages, plus custom pages and plugin pages


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
    header('Location: ../');
    exit;
}


function qa_q_list_page_content($questions, $pagesize, $start, $count, $sometitle, $nonetitle,
                                $navcategories, $categoryid, $categoryqcount, $categorypathprefix, $feedpathprefix, $suggest,
                                $pagelinkparams = null, $categoryparams = null, $dummy = null)
    /*
        Returns the $qa_content structure for a question list page showing $questions retrieved from the
        database. If $pagesize is not null, it sets the max number of questions to display. If $count is
        not null, pagination is determined by $start and $count. The page title is $sometitle unless
        there are no questions shown, in which case it's $nonetitle. $navcategories should contain the
        categories retrived from the database using qa_db_category_nav_selectspec(...) for $categoryid,
        which is the current category shown. If $categorypathprefix is set, category navigation will be
        shown, with per-category question counts if $categoryqcount is true. The nav links will have the
        prefix $categorypathprefix and possible extra $categoryparams. If $feedpathprefix is set, the
        page has an RSS feed whose URL uses that prefix. If there are no links to other pages, $suggest
        is used to suggest what the user should do. The $pagelinkparams are passed through to
        qa_html_page_links(...) which creates links for page 2, 3, etc..
    */
{
    if (qa_to_override(__FUNCTION__)) {
        $args = func_get_args();
        return qa_call_override(__FUNCTION__, $args);
    }

    require_once QA_INCLUDE_DIR . 'qa-app-format.php';
    require_once QA_INCLUDE_DIR . 'qa-app-updates.php';

    $userid = qa_get_logged_in_userid();


    //	Chop down to size, get user information for display

    if (isset($pagesize))
        $questions = array_slice($questions, 0, $pagesize);

    $usershtml = qa_userids_handles_html(qa_any_get_userids_handles($questions));


    //	Prepare content for theme

    $qa_content = qa_content_prepare(true, array_keys(qa_category_path($navcategories, $categoryid)));

    $qa_content['q_list']['form'] = array(
        'tags' => 'method="post" action="' . qa_self_html() . '"',

        'hidden' => array(
            'code' => qa_get_form_security_code('vote'),
        ),
    );

    $qa_content['q_list']['qs'] = array();

    if (count($questions)) {
        $qa_content['title'] = $sometitle;

        $defaults = qa_post_html_defaults('Q');
        if (isset($categorypathprefix))
            $defaults['categorypathprefix'] = $categorypathprefix;

        foreach ($questions as $question)
            $qa_content['q_list']['qs'][] = qa_any_to_q_html_fields($question, $userid, qa_cookie_get(),
                $usershtml, null, qa_post_html_options($question, $defaults));

    } else
        $qa_content['title'] = $nonetitle;

    if (isset($userid) && isset($categoryid)) {
        $favoritemap = qa_get_favorite_non_qs_map();
        $categoryisfavorite = @$favoritemap['category'][$navcategories[$categoryid]['backpath']] ? true : false;

        $qa_content['favorite'] = qa_favorite_form(QA_ENTITY_CATEGORY, $categoryid, $categoryisfavorite,
            qa_lang_sub($categoryisfavorite ? 'main/remove_x_favorites' : 'main/add_category_x_favorites', $navcategories[$categoryid]['title']));
    }

    if (isset($count) && isset($pagesize))
        $qa_content['page_links'] = qa_html_page_links(qa_request(), $start, $pagesize, $count, qa_opt('pages_prev_next'), $pagelinkparams);

    if (empty($qa_content['page_links']))
        $qa_content['suggest_next'] = $suggest;

    if (qa_using_categories() && count($navcategories) && isset($categorypathprefix))
        $qa_content['navigation']['cat'] = qa_category_navigation($navcategories, $categoryid, $categorypathprefix, $categoryqcount, $categoryparams);

    if (isset($feedpathprefix) && (qa_opt('feed_per_category') || !isset($categoryid)))
        $qa_content['feed'] = array(
            'url' => qa_path_html(qa_feed_request($feedpathprefix . (isset($categoryid) ? ('/' . qa_category_path_request($navcategories, $categoryid)) : ''))),
            'label' => strip_tags($sometitle),
        );

    return $qa_content;
}


function qa_qs_sub_navigation($sort, $categoryslugs)
    /*
        Return the sub navigation structure common to question listing pages
    */
{
    $request = 'questions';

    if (isset($categoryslugs))
        foreach ($categoryslugs as $slug)
            $request .= '/' . $slug;

    $navigation = array(
        'recent' => array(
            'label' => qa_lang('main/nav_most_recent'),
            'url' => qa_path_html($request),
        ),

        'hot' => array(
            'label' => qa_lang('main/nav_hot'),
            'url' => qa_path_html($request, array('sort' => 'hot')),
        ),

        'votes' => array(
            'label' => qa_lang('main/nav_most_votes'),
            'url' => qa_path_html($request, array('sort' => 'votes')),
        ),

        'answers' => array(
            'label' => qa_lang('main/nav_most_answers'),
            'url' => qa_path_html($request, array('sort' => 'answers')),
        ),

        'views' => array(
            'label' => qa_lang('main/nav_most_views'),
            'url' => qa_path_html($request, array('sort' => 'views')),
        ),
    );

    if (isset($navigation[$sort]))
        $navigation[$sort]['selected'] = true;
    else
        $navigation['recent']['selected'] = true;

    if (!qa_opt('do_count_q_views'))
        unset($navigation['views']);

    return $navigation;
}


function qa_unanswered_sub_navigation($by, $categoryslugs)
    /*
        Return the sub navigation structure common to unanswered pages
    */
{
    $request = 'unanswered';

    if (isset($categoryslugs))
        foreach ($categoryslugs as $slug)
            $request .= '/' . $slug;

    $navigation = array(
        'by-answers' => array(
            'label' => qa_lang('main/nav_no_answer'),
            'url' => qa_path_html($request),
        ),

        'by-selected' => array(
            'label' => qa_lang('main/nav_no_selected_answer'),
            'url' => qa_path_html($request, array('by' => 'selected')),
        ),

        'by-upvotes' => array(
            'label' => qa_lang('main/nav_no_upvoted_answer'),
            'url' => qa_path_html($request, array('by' => 'upvotes')),
        ),
    );

    if (isset($navigation['by-' . $by]))
        $navigation['by-' . $by]['selected'] = true;
    else
        $navigation['by-answers']['selected'] = true;

    if (!qa_opt('voting_on_as'))
        unset($navigation['by-upvotes']);

    return $navigation;
}


/*
	Omit PHP closing tag to help avoid accidental output
*/